Apparatus for molding fancy-tread tires.



J H. MICHELIN.

APPARATM FOR MOLDING FANCY TREAD TIRES. APFLieAT'ioN EiLE'D JAN 10, 1910. RENEWED SEPT. x4. I916.

1209,60? Patented Dec. 19, W16.

JULES HAUVETTE MICI-IELIN, OF NEW BRUNSWICK, NEW MICHELIN TIRE COMPANY, OF MILLTQVJN, NEW JIER$IEY, .113 1;

NEW JERSEY.

APPARATUS F038 MOLDING FANCY- BREAD TIlltES.

Specification of Letters Patent.

Patented Dee Ltd,

Application filed January 10, 1916, Serial No. 21,283. Renewed September is, Serial No. mullet.

To all whom it may concern Be it known that 1, Jones HAUVET'I'E MrounLiN, a citizen of the French Republic, residing at New Brunswick, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Apparatus for Molding Fancy- Tr ad Tires; and I do hereby declare. the

- fo lowing to be a full, clear, and exact'de scription of the invention, such as will. enable others skilled in the art to which it ap pertains to make and use the same.

My-present invention relates to the manufacture of fancy tread tires, and it is intend ed to provide a cheap, simple, efficient and durable means by which fancy treads may be molded on rubber tires. Under the pre ent practice these tires are either-(l) manufactured in shells, or parts of shells, in which are cut, with the help of lathes or milling machines, diiierent kinds of grooves which show in intaglio the design to be reproduced in relief on the tread of the tires:

or (2) there is placed on the outer rim of the tire a strip of flexible elastic material, such as rubber, which is produced in a special mold bearing the desired design.

The first process requires a mold toreach design of relief to be secured, and it is very expensive to obtain certain forms of relief;

moreover this requires the use of molds in several sections, to permit theltalg'ng oiit of the tire. The second process is ilso ob.- ectionable, for besides requiring as many special molds for obtaining the rubber strips as there as designs desired, it also requires the continual replacing of the rubber strips, which are quickly burnt in the process of vuloanizing', and can only make a few cor s. These objections are in a large measure obviated by the use of the apparatus hereinafter described.

accompanying and is provided on interior in a se- "105 of forms 6 TH thereto K eh together constitute in elier ti lie on to be shown in intaglio on the tread oi the tire.

C represents the 1' t""ior core used in molding the tire, ill. represents the tire whose tread d is i in i die to our respond with the relief on the interior of the band B.

The tire is molded in the mold in the usual way, and when the shells A and A are removed the band B may be readily sprung away from the tire in a single opera-tion.

The band B should preferably be made of steel, or other resient metal, and may be quite thin and light, and the forms 5', which may be of any desired configuration, may be stamped out or riveted to the interior of said band, as shown in Figs. 1 and 3.

By having hand ith diil'erent styles of design in relies ,reon, various styles of fancy treads olded on the It will be seen that bands are cheap andlight, and that I lieation of the design thereto may very cheaply and readily done with iiut the n y or any high grade or expensive machine worlr in cutting the sanie.

It is also evident that, if desired, plain bands may be substituted for the bands having the design thereon, as shown in Fig. l, in which case plain earl tires may be made. Thus, by using the :7 no shells I am able to mold plain tread casings for tires, and, by using the embossed band, to mold all the designs required, hy simply changing the form of the design. y it will noted that the band with the design thereon will ordinarily last as long as the side shells constituting the mold, and that thus apparatus is very durable, as well very cheap and simple.

W se /C,

t various modifica- 

